Can You Press Button in Mid-Air?

If you press buttons in mid-air, you get no feedback. That always bothered me about movies where you just have like a huge virtual screen in front of somebody and they start poking things and typing. So I think you do need some sort of a tactile thing for that to be real. There's some cool tech with things like ultrasound and stuff like that to give you like mid-air feedback. But yeah, having a little fleshy button to push gives you the right feedback.

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